Motor operator assembly



u 1943- s. c. SHIPLEY ET AL 2,326,692

MOTOR OPERATOR AS SEMBLY Filed Jan. 20, 1940 3 Sheets-Sheet 1 .JJnventors Sglvcumus C. SIM-1101.23 Ward. H. Ingersoll 2 Benjamin. C

Aug. 10, 1943. s. c. SHIPLEY ET AL MOTOR OPERATOR ASSEMBLY Filed Jan. 20, 1940 I5 Sheets-Sheet 2 0 5 0 4 8 u k xk n mmfi 7/47/61 8 q 3 8 m w V fin M T 0M2 x O m 7 lo M m a m N A3 n a .1 w .F m owned E L f m w, 5 m rC u e a m .1 1m 3 dmw a w W m Patented Aug. 10, 1943 2 2,326,652 Lame-e pley, Minneabolis, -Ward H;

- w lrigersoll, 5t. Pam-ma Ben asim- Oyrr mi r' 7 v polis, 1\'linn., a2s'tg:n;ors to Minnmpolis -Honey- 1 1 wemkegulator Gompany, Minneapolis, :iMinn.,. li" t r i .a e orpe atiom fi'rll wa ez. l

- "e e g tics graham 10-.,S iiatN sit-sea 3 to promotefeconomyof meantim 'ij' r Another obje'ot is to; or vide on slembling a' r'r' 'dfiorloper'ator'einbodyingi a gea v re: d'mtibntrain and pn r witchesjvithout the use of rivets;welding, or"likefasteningmeans, Another object istoflfirovi'd' a 'dan'i 'aertmotor' assemblyiembodying a rdutionfgeartraidand; a Control panel havingmeansior manuall'anfd' automatic control, the'iiarts being so 'struqu ally related thatthe entire'unit can be'a'ssembled and disassembled substantially withoutiools. 2Q f Another object is to provideamotor operator assemblyjhaving its oomponenti'parts retaine'd'in their prop e'i' relationshipjby hookand slot joints; 'Zlh'othe'r Obictisftd-Mfovidfj. motor operator assembly comprising a'fianrezifid a control panel attachable thereto wherein; fall of the eleotri'caI terminals and oontacts nefiessary for operation and control of the" motora fe. mounted oii the' a I a.

Another object to. provideflfie combination 3!: of 'a transformer housing mounta' bleupona wall and a motoroperator'assemblyineludiiiga casing attachable to v tlie transformer housingffor moun'ting. 4' 4.

Another object is toprovide a Controlganel having a manually operable switch arm cooperat ing' with contact strips integrally with eleetrical terminals on the panel-. v Another obj'eet is to'provide an' auxiliary switch in combination with a'motor operator wherein a 40 freely movable roller is interposed between the switch and its operating'means. 4

Another object'is to provide a damper v motor operator and control meansofflthe three Wire type including amanual controller, a thermostat, and, a limitfoontrollenfthe wiring connections; beingsuch that the limit controller is in control when the motor oiaer'at'or'hasbe'en operated-ii response to. either the thermostat or the manual controller. t 3 60 Another objector our invention is tominimize the riurnberfot parts necessary in a furnace damper motgroperator'assembly.

Another ohetisto provide aterminal panel attachable toa motoroperatpr unit and having fabrication parts, 'andiassmbfi therefiiso In mp1; 'attacned'fto a; jrmeior "chassif's withbnt matte (o1, ir2 -:-.si. .7 switch meansjfor inifig" page: the panel which.

are 1ri a'.1 0sitioh to be actuated-tithe motor erator w en theipainel TSQBJfifi-Chdthrefid. vS as" to thereby eiiim 'nt' the heed of int'e' rhai w ring for tr eiswitch means, i

' Amtheitifdbieothf ouririventio is provide Ewe l andlfliiprlived bea ports for a rotatable shat I f Another. ob ec me' ro isip ,i oifdeinouritable. shaitbearingfsiwh may be i'movahly mounted fastening meahss'li'h asrivetszboits or the like; no: a nqe'rsliafi ingfliar our invention e ren e bef q l fi -l ile de'ssrip ona d'mnex d drawin whereini'. L mm l'ii ,.ar fm i ibt l' n w vo complete damper fi iotofassemoiy ken, along lfi'ne" IT-'4 qfFigm-e 2, .,'l-

"Figure 2 'is a side e1evafiimiior the device of Figure 1, in cross section taken along line "2-2 of Figure I Figiir'e 3 is.a view of the qcintrolpanel as seen from the right on, figurelfwith the'pa'nel rotated nt-em t amew'o the'underneath or opposite d aims-renewssh wnmm mea;1

Fig e 5 is a detair viewfof apart on;

igure 6 is a detail view or. ashaft bearing and b n mou n and frame Fi ure? 1's, afdiagrmatid'illustration showa transformeras'wiil pre'se'r'ltly be described, the

base I0 having. a fiangeTf which is attached to 'a vertical Wall; 'The'firame f mi; g't assembly iseomp'ris'e'd' of. two jspaced'plate mem bers 1'2 "and f3"correspondingly shaped, these plates be j i Joined b'yfan integral transverse:

portion 8' secured to base I i] By a screw 9. The

shape of these plates'maybe readily ascertained by viewing the plate lion Figure 2. The base l0 forms a generally-reotangulegfhousfng having a pair of slotted openings for each of the plates I2 and I3 these openings for plate I3 being designated I4 and I5 on Figure 2. Each of the plates I2 and I3 has a pair of tongues or fingers, these tongues being designated I5 and IT on plate I3 in Figure 2, and they. are arranged to extend through the -slotted fopenings I4-and I5 in the base or housing Hi. It will be noted that the opening I4 is of a greater extent than the opening I5 and the tongue I5 has an extending portion so that this tongue and the opening I4 form a hook and slot joint, sothat when the plate I3 is in the position shown with respect to the base I the tongue I? will just engagethe opening I5,

The material of the frame has:

enough resiliency to permit a small amount of spreading of plates I2 and I3. and normally the plates are retained in their proper spaced rela tion by means of a plate I8 (see Figure 5) arranged transversely to the plates 52 and I3. The plate I8 has tongues I9I3 and 29 20 on itsopposite edges, the tongues 29 having extending portions which form hook and slot joints with correspondingopenings in the plates I2 and I3, the opening of plate I3 referred to being designated 2! on'Figurez. The plates I2 and I3"also have corresponding openings 'enga'geable by the tongues III-I9, the numeral22 desig-' nating this opening'in the plate I3. When the pIates'IZ and I3 are spread apar't'slightly from theirnormal positionsthe plate I 3 can be put in itspositionwith its tongues engaging their respective openings 'in'the plates I2 and I3 and then by moving plate I8 to the right looking at Figure 2; the extending'portion's of the tongues 2Il20 will grip the outside of the plates IZ'a'nd I3 beyond the openings 2i; Thus thelplate'lfl securely locks the plates I3 and I3 their" proper relative positions. I A

Numeral 25 designates generally an electric motor having a frame 26 which is secured" to the 'pIateIZ by means of screws 27 and 28 extending through suitablespacing members 29 and 30. The electric motor itself is of a known type and has ajpinion gear SI On its shaft which drives a train ofreductiongears designated generally'at 32, the reduction gears being mounted on shafts the ends of which are journalled i'n the plates I2'and I3. The last gear of the reduction gear train designatedfl33 is mounted upon a shaft 34 so as to drive" the said shaft. Numeral'35 designates a brake mechanism for. limiting coasting'cf the motor and gear'tr'ain after the motor is deenergized, this mechanism comprising a resilient blade as 'shown adjus able by a set screw and having a forked end engaging a flat sided collar 3501i one of the shafts journalled in side plates I2 and I3. Collar 35 is urged against a gear near the high speed end of the gear train and the friction acts as a brake to reduce coasting of the motor.

It will be noted that the shaft 34 extends all the'way through the plate members I2 and I3 and 'exteriorly of'the housing of'the motor as-.

sembly which will be described later. At the ends of the shaft 34 are mounted operating arms 31 and 33, these arms having their ends bent back into a U-shape and being drilled to receive the ends of the shaft 34 and having set screws Hand 40 passing through the U-shaped portions so as to rigidly secure the arms to the shaft. The arm 31 may have an extension 40 as shown suitably" fastened thereto by means of a bolt 4| and spacingwashers.

The shaft 34 passes through bearings 42 and 43 mounted in the plates I2 and I3, respectively. The bearing 43 and the manner of its mounting is shown in detail in Figure 6 which also shows a small portion of the plate I3. Referring to Figure 6 it will be noted that the plate I3 has a roundedzopening 44 which is connected to the edge of theplate by a slot 45. The position of the opening 44 and slot 45 may be readily ascertained by noting slot 45 of plate I3 as shown on Figure 2. The bearing 43 comprises a circular of slightly smaller diameter and so shaped as to fit. into the opening 44 and slot 45, the circular portion 46 then'acting as a flange engaging one side of theplate I3. Thus it will be seen that when the bearing 42 is fitted into the opening 44 and slot 45 the bearing is then not free to rotate or to be moved vertically. Thus in assembling the shaft, bearings, and frame, the plates I2 .and I3 are spread apart slightly, and with the bearings on the shaft, it is'moved down through the slots correspondingto theslot 45 in plate I3 until the'be'a'rings 42 and 43' are opposite their respective openings. The plates'l z "and; I3 can then be drawn together until the bearings 42 and 43 are fittedintotheh respective openings and the plate I8 then'l'oclred into position, ,Afterthe partshave been soassembled itwill be seenthat the bearings 'are' locked 'injp'ositionj thereby 're-. taining the shaft 341m itsproper position and likewise the plates iz'and I 3"are retained in' ;position by the"platellfi 'sofithatthejassembly as so far described .is securely held together in its proper relationship in' all respects without rivets or bolts or other fastening means of that. type.

Furthermore theassembly as so far described can be made without the use of tools of any kind and likewise to disassemble requires no too'l s;l

Referring now'to' Figures 1, 2 3, and 4, numeral 50 designates a control and terminal panel which maybe made of Bakeliteor other suitable compositionmaterial. The panel 50 is generally rectangular and "has depending web portions5l and' ;52, th e depending web portion 5I having a pair of grooves 53and 5'4 spaced the same 'distance apart as the plates I2 and I3. {I'heplates IZ and I3 have tongues-'55 and 56, respectively, which are adapted to bereceived in the grooves 53 and54 of panel '56 (see Figure 4) The depending web portion 52 is secured to the plate I8 by a single screw 5'! when the panel 50 is in position. The screw prevents leftward movement of plate I 8, as seen in Figure 2, thereby preventing the unlocking of plate I8 from side plates I2 and I3. Similarly screw 57 prevents downward movement of panel 50. as'seen in'Figure 2, which movement is necessary to free the panel from tongues 55 and 56 due to their shape the grooves 53 and 54 being configurated to causetongues 55 and 58 to hook them. The panel 50 has a pair of switches designated generally'BO and .BI depending therefrom, these switches being shown in broken lines on Figurez, and the switch 60 being shown in full lines on Figure 1. The switch 80 comprises a pair of depending contact blades 62 and 63 carrying contacts adapted to'engage with each other. The. switch SI comprises a pair of depending contact blades 64 and '65 carrying contacts adapted to engage with each'other. The blades 53 and 65 are bent as may best be seen by viewing the arm 63 of Figure 1, so that these blades can be engaged by an insulated lug 66 on gear 33 for purposes of actuating these blades whereby to operate the switches 50 and 6|. It will be understood that the switches Biland BI form iim'it control switches to iimit the amount of rotation ofithe motor-25;; 25' is of. wpe which always operates in the, same direction when energizediits operation being terminated by .one of the limit switches after each i80-of movement and. when again. energized the circuit being through theouher limit switch. x when the panel .50 is inpositicn'theswitches 60 and 31 depend on opposite sides of the shaitfitin position to be .actuatable any the lugfifi as stated above, on first. w

viiigure .3 shows-the exterionsidei-oi the panel 50, and .4ishows. the underneath side-of the panel. Numeral .8] designates'a manual operating ,knob .inozunted-on a spindle 58 extend-'- in: through the panel 50 and secured toe-switch blade :69 by any suitable means'so that the switch blade is rotatable bwthe manual knobs The switch blade. has acoutact-u alt its ieftend and aieontact H at its right end' i see Figure 4). litre web 52 oipanel 50 has a piural-ity o i elec tficad terminals 12, 13,14, "15, andJS these to?- minals :being .of .atype. including a "screwfor aittachmg an electrical-connection to thc terminai. Forming-part of ithe terminals Li-and 15 are contact strips T1 and I8 imbedded in the Bakelite. material, and which" are adapted tobe engaged by thercontacts 10 and H, qe'spectiwiely.

When the manual knob 61 is in the' positioriiindicated Center on Figure 3 theswitch 'blade 59 isin the position as shown'in'=1 ig4ire-4.=- When the manual .knob 6 is to the position marked Openin Figures-the contact- Wis-moved into engagement withthe contact strip-1:1 --an d the contact H is moved out of engagement with the contact strip 7 8. When the manual knob 81 is moved to the position marked clcsedon-Figure 3 the contact H is moved out of engagement with the strip '18 and intoengagement with another contact strip 19, the switch blade 69 moving in a clockwise direction as seen on Figure 4, -The contact str-ipld forms part of blade 65 of limit switch Bl, part of terminal 16, andalso part of anot'her -electrical-terminal 80 as seen on Figure 4. Numeral =81" designates a contact stripor plate forming part of the terminal 14, this contact strip 81 including a-portion through which the spindle 8 extends'and which is continuously in electrical contact with the switch blade 69.

mic-contact strip =84 also includes depending extension ;8-2 to which are attached the blades 62 and 4 of limit switches of limit switches-60 and 64. Numeral 83 designates a contact strip form lug part of terminal 12 and with which is-attached one blade 63 of the 'limit switch 60. in addition to the terminals so far described there is a terminal 84 connected to the -contact strip 83 and connected terminals 85 and 85 at one cornor of the panel -50.

-In connection-with the foregoing description of the contacting mechanism and electrical terminals of the panel 56 it i pointed out that the purpose of the terminals and contacting mechanism is to provide for electrical wiring arrangements whereby the motor operator as; sembly can be controlled from a thermostat or the like or the three wire type or from the man'- uall knob 61 or from a limit controller. The arrangement of the wiring connections and the various circuits of the motor and assembly are shown in Figure -7 which'wil l presently foe described. It is to be understood-that the purpose eithe manual knobs! and its associated switchgnechanismlisito manually control the motor tor the purpose .of. closingthe furnace dampers,

tor"examplewhen desired to' thank. the lite. Thus nomahy zithelfmanuai knob flaisiiirthe center motor operator is under automatic control of theithermo stat. In practicethe wiring -circuits are arranged so that upon turning the manual-knob 51 to the osition marked Qpen the motor operator operates-in a direction toopen the furnace dampers and turn-- ing the knob- 61 to .ltheiposition marked Closed causes the-motor bperator to-operate in a'dizrection to'closethedampersi P -'ReferringtoFigures 1;:2-and 8 numereitl designates lgenerailyan auxiliary switch mounted on the-platel3" and arranged to be bperated by themotor' oper'atorp- The switch 87 comprises two identical halve which-when put together form a housing or :the switching members. Numetal 88? designates'one of-thesehalves' which may be formed'of Bakelite or othersuitable composition. #Theinner side of each of theh'alves has a depressed or recesscdportion oi the shape indicatedat-BS in Figure *2. Numerals 90 and 94 designate angular contact brackets arranged at the'corners of 'the'auxili'ar-y switch these con: tact brackets-=having portionsdesignated 92 and 83whiol1:-. are disposed in suitable grooves in the Bakelite portion of the switch housing-it-being understood that portions 92 and 83 fitinto 'corre sponding grooves in both halves of the switch housing The other' -corresponding half cr -the switch housing 'is designated at 93 and as may be seen in Figure 1-, 'when this half is super.- imposed onthe' half 88, the portions 62 and :93 (if-brackets 98 and 94 extend through-the-Bake liteand into theinterior of the housing. Whe half 94 maybe secured to the half 88 by means of screws-B5 -'eoetending=-through suitableiopc'rnings' and into threaded engagement with'the plate IS. The contactbiackets 92 and 93 carny 05ntact' members adapted to engagewith contacts on the end of a contact blade 91. The contact blade 9-! has its opposite end engaged in a groove in -the Bakelite-material of :both' halves of the housing. in the same manner that; ortions. -92 and 93 oibrackets 90 and '9! engage in horror spending grooves in 'both halve .ofthe Bakelite housing. Engaged in=the same groove as the end"'o-the contact strip 9i is a portion. of a contact bracket 98 'similar to the brackets 99 and 91. Contact brackets so, 9| and 98 each carry a suitable terminal screw 96. Numeral mo designatesa fibre disc whioh-iscircular in sh pe and adapted to fit into a circular portion of the recesses in the corresponding halves 88531.1(]..8 of the Bakelite switch housing. in other words, when the-halt 94 of the switch housing is super.- imposed on-the half '88 the-fibre disc I00 will fit int a circular portion of the recess in the half 94 corresponding to the recess 89 in the half 88. The recesses in the corresponding halves of the switch housingiextend to the edge of the Bakelite material so that when the auxiliary switch is assembled the fibre disc I00 extends beyond the edge of the Bakelite and can be moved ina direction to actuate the contact blade 91 and operate the contacts associated therewith. For operating the auxiliary switch there is a cam 401 of semi-circular shape arranged to engage the fibre disc HNL'the cam ml having a collar )2 which is secured to the shaft -34 by means. of a set screw L93. 1 Whenever the'cam ll in engagement with the-fibre disc 400 the contact blade 91 is in one oi'it-s positions and when the cam till is moved in one direction or. the other to such. an extent that'i-ts surface is moved out .ofiengagement with the fibre lllflptthecontactblade '91 moves to;its:other'-position.: "Thus; when our operator; assembly-is- -provided with an auxiliaryswitchrfl; theassembly may be used'in adual controlsystem ,in which an auxiliary threeewire device; which may, :for example, be another -.oper a'tor assembly such as the one described herein;- is"cont ro1led;by-the switch and' immediately set :into'; operation following operationrof thepmainassembly. r Within the base portion I;as .hasbeen pre- 'viously stated is, mounteda transformer generally designated IOB., As seen'on Figure -2 :the trans .former-I06jcomprises a plate or:,support Iiil to :which: the transformer core'IIOis fastened by means of'suitable screws VIGBand I09, there being suitable brackets andaspacing-a-members to space theitransformer core-from the plate III'I. Theltransformerj windings are covered bya protective shield III-and connections are madeto the-transformer by means of a plurality ofterminals comprised of screwscorresponding-to,the screw IRS; The plate .10] has a Dentin-flange portion -I I2 which has an opening to, permit electrical; leadsto .be extendedgupwardly; therethrough, and through a; corresponding opening in-the housing I0.... '{l' I The-motor operator: assembly other than the transformer and housing; I0 .is enclosed;within a.housing' comprisedof four-side plates designated II3', --II4, H and, I16. (Figures land 2). The side plates 3 and ;I It havetongues which engage in suitable openings in flanges Iflarand IIlb,resp'ectively forming partof the, base-I0 and have bent over port-ionsiat: their opposite edges which are arranged .-to, grip the panel 50. (See Figures 1 and 3),;difter thesideaplates H3 and -I I4 .aretin position as shown inFigure-l thegplates H 5zandl=l8 31'8"pl1li in position-onrthe opposite :sides at the assembly. 'Iheplates I,I5. and H6 are dished, or, that-is, they-have a continuous flange around theirfjedges:arranged'to -fitover the 'edgeslof the plates 5 lll3grand IM and the paneli-50 in the manner'of a cover- (See Figure 3.).; The plates l3 ands-:II4- have pr jections which look; with-the plates -l I 5-=and H6- when the parts have been assembledso as to securely retain .the various elementswf 'the housing in properly closing relationship, H From the foregoing itz'wi-ll-be understood that when our. improved operator assembly is used to .operatedurnace damper chains or the like the base' 'portion :lfi-ismounted on a wall or the like with theimotor operator assembly in the position as .shown-dn Figure =2. ;The. necessary electrical wiring may, then be carried through the base I0 to-the transformer-and to the interior of the operator-housing, it being understood that all of the terminals von the panelj 50 described in connection with Figure 4 are within-the motor operator housing. The entire assembly thereforepresents a neat and attractive appearance with the manual operating knob 81 in an easily visible and available position.

Referring to Figure 7 of the drawings, the control panel 50 is shown diagrammatically in perspective so as to'more clearly disclose the relative positions and operation of the various switch members and contacts. The motor is shown at 25 and the transformer iI06'isrdiagrammatically shown as having .a primary winding Ill and a. secondary winding II8. In addition to the motor and transformer there is shown a thermostat H9 of the 'double contact type, this thermostat comprising a bimetal elementt; I 2 II arranged .toza'ctixate a: movable switch blade; I2 Iij which engages 'Withra' .fixed electrical contact; l22p-upon "a; zdr'op' in temperature. tof-a predetermined .yalue; and whic'hfengages a .fixed contact i23-upon a rise in temperature to a prei determined? zlligher. value whichmay be one or two-degrees :hi'gher; i for example; Numeral TI 24 designates 2; limit controller I 'of zra'ikn'ow ni type which may ibeznalaced' in. the: bonnet or stack of ail-ED306701 -boiler,-the drafts'of which are operated by the damper motor assemblyf'orour invention and which is controlled by" the: thermostat III 9: -,Th.e:limits controller I24: includes a pair oi switch,=-blades I25 midi 126 cooperating with fixed electrical contacts 12 I and" 128, a 'respectively; -Bo th of these "switch blades. are operated by; a thermostatic? element .wli'ich -is of; a known typeuand whichiis;usually=ioflhelical form, and is usually located as mentibnediabove so: be responsive to bonnet arr-stacktem perature.---The switch arm I25 engages the contact I21 upon a .fall' in temperaturezand normallyythis switch is closed. r-Upon'ia trisejin tem-: perature to aiypredetermined- .relatively high value, the switch arm 1 I25 disengages";from. its associated j contact; andthe. switchzarmul 26 engages its associatedjc(in ct;itv being understood hatthese-switches, act inia-known manner vas fll m tc n ol. we H a With the, circuit arrangement which Lhave shown in Figure ;'7 the thermostat may cause: the dampermotor to'operate toieitherlopenorzclosed position of. the draft damper of-the'z furnace or boiler,:'it being understood that-wherr the'l-draft damperisopen or closed the :ch'eck-is 'moved' to theopDQsitc position. As will; presently; become a parent, thelimit vcontrolleris incontrol of the damper motor either whena'itds operated to-ppen position of the draftdampers in re-v sponse to the manual knob or thermostat so that in the event of the furnace or boiler tempera-.- ture rising to an unsafely high flvaluej the limit controllerwould cause thedamper motor to ope rate t he draft dampers back to closed; posi tion irrespective of thema-nual knob or the thermostat. g

1 All of ;the; ele1 nents associated with :the controlpanel- 5G; are-numbered; the, same as previous figures. "The operating circuits whereby theyarious operating functions are brought about will now be -described. 'With tlielpartsin the position-showmthe thermostat is; satisfied and the temperature ofthe furnace or.;;boiler is such that lthe limit control.-switch I25 is, en, gaging its-associated contact and the switch arm 525 is disengaged from its associated con-- tact. Upon a drop in'space temperatureto a predetermined value causing the blade I2I of thermostat II9 to engage the contactgI22, a cir; cuit will be completed for energizing motor '25 so. as to operate the draft dampers to open position as follows: from secondary H8 of the transformer through a wire I30, terminal 80, contact strip 19, switch blade 65, limit switch 6|, switch blade 64, bracket 82, contact strip 8|, switch blade 69, contact II, contact 'strip 18, terminal '15, wire -I3l, thermostatic element I'2Il, blade .I2I, contact I22, wire I32, terminal- I33 of thevlimit controller, wire I34, switch blade I25,.contact I27, wire- I3 5, terminal I36, wire I31, terminal I2, contact strip 83, terminal 84, wire--I3 8,motor 25, wire I39, terminal 86, terminal 85, andwire-:-I40 back to secondary H8. The motor 25 will 'now operate until the-dampers have moved to a position wherein the draft damper is open, the limitswi'tcnm being operated in the manner previously described by the lug 66 soas to interrupt the motor circuit leaving the dampersih the'positiunto wh'ich they-were operated; With the dampers in: tins positionnormally, the spacetemperature: will rise until the; blade m or thermostat H9 en gages: the: contact I23; at which time a circuit will be completed for the damper motor causing it to operatethe damper in amanner to close the draft and open the checmtiiis' circuit being asfollows:- from secondary tr: through wire in, terminal 80; contact stxip"'l9; terminztl f8; wire WI, :t'mnmail H2: or the 11min? 0011131 011 61; wire: I43 terminal 14! a: the-13m controller,- who in, contact I 23, thermostatic modem; thermostatic element tmywire tit, terminat 15, contact strip 1 contact"; switchblade 6!; contact strip-'BIg-bracket 82!, switch contact strip 83; terminal kl, wipeiiit -motol: 25, wire I39, terminal 86, terminal 85; and wire I basic to secondary I it. Upon complction of this chfcuicthev motor will: operate the dampmto closed positim' of the: draft open poslticrro! tire-check;

'Ifit mould be dcmeell to'operate-the dampers: to composition o1. own: by means: or the manual'knob, the WI. know-maybe turnedto the open position seem m'Figiml'e 3. so' as tom time switch-am 091 it: a coimtemlockwise dfrectim Casi seen on Figure: 71) thus bringing contact Ill into engagement with; contact strip H This compl'eim animal; for the: damper motor'as from H8 throughwl're HU 'tmnmofl ac, contact strip 1-9, switch blade 6!, limit switm M, switch blade 64', bracket 82" contact strip 8 t switch mane Loontact to, contact strip 1?,- terminal 13, wire 11%, terminal l'3$, wire I, switch blade r25; cootact I21, wire I termimli flic'wire' Ii-l, terminal #2, contact strip I3 immoral M, wire I38; motor 25,

wire =I 3I, terminal .alc'terminal 85-, andwirc' in: back to secondary I to. Completion oi this circuit will: cause :the damper motor to operate in a to mm tine rirait to an open: position and close the check: It a human operator desires to manually cause the dampers to be operated to ciosett positibn of the draft and open position of the check, he toms the manual knobto' 'the- Closcd position; as seen on Figure 3 which toms theswitcnmt! in a clockwise direction as seen on Figure 7 positions the contact H into engagement: with the contact strip 19 completing a'clrcmt ilor the damper motor as folrows: from secondary'lta through. wire m, tenhinal as; contact; strip I9, contact 1 I switch blade: fii csmtact strip 8d,. bracket 33,; switch blade 82, 1mm swlfich 88,. switch blade 63, contact? strip 83,. term-marl 84, wire 538-, motor 25, wire I 38, comma: 86, terminal 85,. and. wire M0 bad: to soomidaryflflr 'Ulpmi oompietion of this incl motor operates the dampers as ointed outta closedposition all the draft oil'sdv open positton or the check. It by accident; the mac should; be left tn a asmay often happen, wherein tho draft damper is in sin-open posltion and-the dmdfi is closed, thait, is, with'theswitch.- arm 69 in the position where. the contact 10 engages the contact strip IT, it will be" seen that are rim-it controller m remains eii'ectiv'e' to cause the damper motor to operate the damp" ers to closed position of the draft in the event that the furnace orbo'ller' temperatmo' should rise to an unsarcly high value; Under these circumsta'nces, as has already been described, switch blade I25 would disengage from its associated contact and the switchblade I28 would engage the Contact I28 completing a circuit as follows: from secondary H8 through wire I38, terminal 33; contact strip 79, terminal 15, wire I II, terminal' I42, wire I43, terminal I411, wire I41, contact I'M, switch blade I26, wire I48, terminal I49 oi the-limit controller, wire IEi terminal M, contact strip 8!, bracket 82, switch blade 62, limit switch 60-, switch blade 83, contact strip 83, terminal 84, wire I38, motor 25', wire- I38, terminal 8%, terminal 85, and wire I40 back to secondary H8. Completion of this circuit'will cause the motor to operate the dampers to closed position of the draft and open position of the check. It-is=-pointed out that the circuit last described is not dependent upon the switch blade- 68 and that thereiorewhenover the-switch blade I26 engages the contact I28, the said lastdo scribed'e'rroui t willbe completed to bring about aishut-down of the furnace-or boner as described;

It wiikbe-understood also: that the switch blade I-Zidisengages from its associated contact before the bladat'w engages-contact I28 upon rise in temperature so that under these: circumw' stances is! impossible to'com-plctea circuitthrough either the thermostat or the manual switch fior ea-using the motor to operate in amanner to open the'd-rait damper inasmuch as is apparent from the foregoing circuits as traced these particular thermostatic and. manaaillwcontrolledci-rcuits extend-through the limit switchformed by arm: I25 and contact 21,

From the foregoing description itwill be apparent tothose'ski-lled' in theart that we' haveprovided a novel control arrangement wherein the iu-rnacedampers may be operated to 'sny desired position either manually or automatical- 1y merely bym-akin-g and breaking of contacts, and that when the dampers are operated either automatically or manually theli-mi-t controller remains in control and by means of its thermostatically mode and open switches it may in- I terrupt thermostatic and manual control oi the damper motor, and-furthermore may cause the dam-per motor to operate the dampers into closcd position of the draft and open. position or the check hr. theeventthatthe furnace or boiler temperature-rises to an unsafe value.

Those skilled. in the art will appreciate the manifold utility and advantages of our inn movements-in the manner 0? forming and assemblingthe various parts of a motor ope-rated device of the type disclosed. The entire assembly-may=lqe made substantially without toolsand! the use of riveting, welding or attaching parts Lo y-screws or bolts is almost entirely ob viated'p- Allof the individual parts and the assembly itself are of a nature to promote the utmost in easeof fabrication, assembly, and ultimate production. The entire system when installed: is entirely safe although it provides everything desired in the way of convenience and dependability of control. Even though there may be negligence on the part of a human operati-vo,-the automatic controls are oi such a nature as to preclu'de the possibility of dangerous heating conditions arising.

The embodiment of our invention which we have disclosed is representative of one-of its preferred forms and is illustrative of various changes, modifications and devices therein which may be made by those skilled in the art. The irrventioriis to be limited not by our disclosure moving in a" direction 2.-In' a' motor' frame,'--in combination, spaced members-, spacing means-for'retaining said mem' be'rs in space'd relation, means forming' hook and slot joints for locking said' 'spaced-"members and spacing mea'ns together; a panel detachablyfise ciired to said frame, means forming tongue and groove Joints wherebv said: frame and paneiiienf' age each other in'a' manner requiring moverner'it ofsaid painel in'-a"given 'dire'ction to 5 disengage it rrom'said'frameyand meansattaching aid panei and said spacing means in a" manner whereb said pan'el is prevented from moving in said giv en' di rectionand'sa'id s'pacingmeans is prevented froni' to unlock itself fromsaidf spaced inembersi -3. In' combination,

ing-switches' depnding-froms'aid panel in a' po'sition whereirrthe switches areadapted to be a'ctu'-* at'ed by said motor, said switches i comprising metallic contact "-strips'," e1ectrica1 terminals on said" baner formed integraiiywith and contact; 40

strips; and means *oor'nprising a l manually ope'r-' able switch blade "constructed and arranged to be moved into and out of; contact with one of s'a'id metallic contact strips? 4; In" a damper 'motor assembly, tion, a motor'opera tor; a housing thereforco'm prising 'aba'se' for-said operatona pair of sides,

and means for attaching said sides tofsaid base comprising tongue and slot connections, atop' panelada'pted to be==engaged by said' sidesj 'and a second pair of sides'having means adapting them to engage and be clipped'to' s aid firstp air of sides and said'top'panel.

" 5. In combination, on electric nioto'r,"a housing therefor including a control panel forming-a3 part thereoffor cont-roiiing said motor, meansiorm' ing switches depending from said panel-in a posi-" tion wherein the switches'are adapted to be'actm ated by said motor, said switches"'comprising metallic contact strips'y and electrical terminals on said panel connected to said contact strips.-

6. In'a motor operator assembly,"in combination, a frame comprising-spacedmembers; spacing means, hook and slot means relea'sably re'-' taining" said member and s'pacing means, in

locked engagement, a motor supported on the frame; a reduction 'gear'train driven thereby and having" shafts journalled in the members," a.

driven shaft. bearings forthe' driven shaft rnain tained in spaced relatiod thereorifiand openings in the membersfor receiving the bearings; said members engaging said bearings when the mombers 'are'locked in spacedrelation'; "i T .7. In a motor operator assembly, in combination, a, frame comprising spaced-members and means releasably retaining said members in v an 'eiectn motor, a hous ing therefor; a :controlfpanel mounted on said housing:'forc'ontrolling said-' mot'or, means form== in combina- 9 comprising: :in -combination, :-.a transformers, and;

spaced relation, a m0tor;.suPp r.b6d onithez ramee a reduction,- gearv.;train .dri-ven =.thereby and -hav ing shafts journalled'in the members, a driven shaft'extending; througingthe members, bearingsfor the driven-shaft, a corresponding indentation in anedge of each. memberpfor receiving the shaft, said-indentations terminating. .in enlarged openings fon, receiving -said2:bea11in S -When; the" members; are lockedlin spaced relation, and said; bearings: serving; 2 to :retain said driven shaft in; said-indentationsg-w eff '1 1 a e-3,1

8. In a motor:operator assembl-wincombina-e; tion,- a frame comprising spaced. :members and. means releasably retaining said members.;,r-:in spaced reiationga shaft rrotatablynsupported: n, said members, a 'correspondingaindentation inedge of each memberzfor receivingthe shaft saidi indentations terminating :in enlarged, openings-,- andmeans carriediby ithe shaft and,receivable;vv into said openings whensthejmembers; are locked: in spaced relation for retaining the shaft inisaid'; indentations. F: s':'

h 9. .In :a; motor operator assemblygimcombina tion, a .::frame comprisi-ngl. spaced m'embers a (1:

means. releasably. tretaining said} ,members; m:

spaced relation, a shaft.ixotatablyosuppoittedein:

said ;members;.- an: indentation nncannedge .:Qf'- ia least one-of: said-member for receivinguthegshaft, said: indentations terminating min an: enlar ed opening, and-emeanszcarried binthe shaftfandir r.

' ceivable'intofsaid opening whensaid rnembersfire lockediin' spaced relatio forzretainingth Shaft, inisaidindentationi in :ii II :3 i '10::111- a. motor: operator assembly in combina tion, ;.-a.12 frame 1 comprising: spaced members and meanszc releasably uretaining: the. i members q-in spaced; relation, :a' shaft rotatably supported: in: the membersf'bea'rings rortthe shaft-maintained in spaced relation thereon, iravcorresponding indentation in an edge 'offeaclrmember for-deceive: ing the shaft, said .indentations:terminating-i enlarged opningsi forireceivingthe. bearings..-saidbearings "retaining the shaft in position in the; members: when theisanie arelocked; inspaced lation; and said shaft; and bearings. being later-- ally removable from said-members upon; sufiicient spreading thereof to". first axially. :disengage isaidi bearingstherefromit "154.1: a tv 11. A r tra'nsformer. and: motor operator; un t housing-therefor, and-a motor :operator,comprising a' drame detachably secured -to '-said;;:tran s forrrier housing, an electric'motorsupported'on the frame, a panel secured to'said'fra-me for; con-. trolling the'motor, and arhousing for the. motor operator including saiditransformer housing, said panel; first members secured to said panel-and; transformer housing, and second? members se cured to "said panel and said'first members.

12. In amotor operator assembly, in combinae tion, an'electric motor, a,housi-ng therefor, a;

motor frame within said housing, a, control panel; detachablysecured'tosaid frame and forming a; partof saidhousing, electricalterminals i011 thev outside-surface of.) said panel for connections:

" whereby said motor maybe energized,1;switches attached to the inside surface "ofsaid panel and arranged in circuit with said motor, means -actu able by-Said motor for operating said switches, -a. manual switch operator .mounted on the outside;

' of saidpanel, and connections between said manual switch-operator and-,-s aid 1 terminals whereby, said motor may betenergi zedby actuation of], said manual switch operator.

13. Ina motor operator assemblygin combmai-g i tion, a frame comprising spaeed members and "means releasably retaining said members in spaced relation, a motor supportedon the frame,

a reduction gear train driven thereby andhaving' shafts journailed in the members, a driven shaft,

' bearings for the driven shaft maintained in spaced relation thereon, said bearings having non-circular peripheries, and said members having openings conforming tosaid bearing periph- "eries for' receiving the bearing upon relative movement of said shaft and member in a direction parallel to the axis oi! said shaft, said noncircuiar peripheries and openings preventing rotation of said bearings in said members when said bearingsare received therein, and said retainin means being efiective to maintain said members spaced in such reiation'that both said bearings are received in their respective openings.

SYLVANUS c. SHIPLEY. WARD H. INGERSOIL.

BENJAMIN CYR, 

